Comtech EF Data SPOD PS 1, PS 1.5, and PS 2 C-, X-, or Ku-Band - Manual (Page 132)

SPOD C-, X-, or Ku-Band Outdoor Amplifier MN-SPODPSX
Appendix A Revision 1
A–6
• Type "CMD" (without the quotes) into the Run dialog box, and then click OK.
• At the Command-line prompt (typically C:\> ), type "ping 192.168.1.4" (without the quotes).
If the IP address of the unit is not set to factory default (192.168.1.4), then use the unit's user-
assigned IP address. If the ping command responds with the "Request timed out." error message,
then the SPOD cannot be seen by the computer. Otherwise, if there is a time listed in milliseconds,
then the SPOD properly responded to the ping command and it is visible to the computer at the IP
address that was pinged.
Another common connection problem is due to conflicts in the Address Resolution Protocol
(ARP) table, caused when a user connects two different pieces of hardware (with unique MAC
addresses) to a single Ethernet port while both pieces of hardware are configured with the same
Ethernet address.
This often happens when configuring new units set to the factory default IP address with a laptop
that has a single Ethernet port (e.g., Comtech’s LPODnet M&C Netbook Accessory product). If
there are multiple units to be configured that are all set to the factory default IP address, then turn
on one unit at a time, and reinitialize the Address Resolution Protocol (ARP) table each time a new
unit is connected to the network as follows:
• First, check the values in the Address Resolution Protocol (ARP) table on the computer. This
can be accomplished using the Windows Command-line interface:
o
To access the Command-line interface, click Start  Run… from the external PC’s Taskbar.
o
Type "CMD" (without the quotes) into the Run dialog box, and then click OK.
• From the Command-line interface window, type "ARP -a" (without the quotes), and then press
the Enter key.
• If the SPOD IP address is not displayed in the ARP table, then re-initialize the ARP table by
typing "ARP -d" at the Command-line window prompt. The SPOD IP address should now be
displayed when the ARP table is queried again.
• If the unit's IP address is still not shown and the ping test has failed, then verify the Ethernet
settings of the unit using another remote control interface that is not dependant on the
Ethernet port (e.g., EIA-485, EIA-232, or FSK).